JPS6029268B2 - Trunk invalid hold detection method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a trunk invalid hold detection method in a storage program controlled switch.

In the conventional automatic switching system, the method for detecting an invalid hold on a trunk is {1-A method in which maintenance personnel regularly monitor the status of the trunk by checking the operation status of lamps and relays to find abnormal trunks. '21 A method of detecting abnormal conditions by observing trunk traffic, etc., and testing trunks to find abnormal trunks. (3) A method in which maintenance personnel test trunks based on a report from a person who has entered the system to find abnormal trunks, etc. However, these methods have the following disadvantages before detecting trunk invalidity. Yes.'1 - It takes a certain amount of time to detect trunk invalidity, and if the number of invalidated trunks increases during that time, service will deteriorate. [2] Trunk invalidation is difficult to detect and requires skilled maintenance personnel. In particular, private exchanges (PABX) have various service functions, so there are difficult conditions to detect trunk invalid hold due to trunk relay operation status, lamp status, call conditions, etc. The present invention aims to eliminate such drawbacks, that is, to provide a trunk invalidity/holding detection method that automatically detects trunk invalidity/holding, reduces the burden on maintenance personnel, and provides stable replacement service.

That is, in the present invention, each trunk is provided with a memory circuit for storing that the state of the trunk is undergoing a state transition, and a memory circuit for indicating that the transition process has been completed, and these are periodically monitored. This system is characterized by detecting trunks whose transition has not been completed as invalid and pending.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a relay system diagram in one embodiment of the present invention.
B is a subscriber, SW is a link switch, TRK is a trunk, TKC is a trunk control unit that controls the trunk TRK,
CC indicates a central control unit, and MU indicates a storage device.

In storage program control exchange≠several machines, as a method for detecting a change in the state of the trunk TRK, the call processing program periodically sends a trunk change detection order from the central controller CC to the trunk control unit TKC, and the state change is detected in the trunk TRK. If there is a change, the content is sent to the central controller CC as return data. The call processing program analyzes the contents of the returned data and performs state transition processing from the current stable state (steady state) to the next stable state (steady state). Factors that cause a trunk TKR to be held invalid include failure of recovery of the trunk TRK, poor connection, etc. In these conditions, the transition process is interrupted in the process of the trunk TRK moving from one stable state to the next stable state. occurs if

FIG. 2 is a state transition diagram in one embodiment of the present invention, showing the transition of recovery.

In Figure 2, A indicates the trunk is busy, B indicates the trunk is empty, So and S are subscribers, and L and T
, indicates a trunk. Note that subscriber So and subscriber S are the same subscriber, and trunk To and trunk T are the same trunk. When the call processing program detects a change in the state of trunk T in state A and analyzes it as restoration, it performs a transition process to state B.

A storage program control switch does not perform continuous transition processing for one call, but processes multiple calls at the same time, so it processes each function in a time-sharing manner until the transition processing is completed. Complete the process. For example, when the trunk To becomes invalid and pending, if the transition process is interrupted or abandoned due to an abnormality due to a failure during the process of moving from state A to state B, trunk To becomes invalid and pending. In the present invention, the state transition process is monitored, and it is found that the transition process from state A to state B is not completed even after a certain period of time has elapsed, and trunk L is detected as being invalid and pending.

Next, the present invention will be explained in detail, including FIGS. 3 and 4.

FIG. 3 is a storage method showing an indication during state transition of the trunk TRK in this embodiment, and EXC indicates an indication during transition (hereinafter referred to as EXC).

EXC is located in the storage device MU mentioned above, and is located in the trunk T.
It has registered addresses from address 0 to address N corresponding to the RK number. For example, when the call processing program detects a change in the status of trunk TRK numbered 10,
Set the status transition display for the address, and cancel the status transition display when the transition process is completed. FIG. 4 shows a monitoring method for detecting trunk invalid hold in this embodiment.
SUP indicates a monitoring registration area (hereinafter referred to as SUP).

The storage device SUP is located in the storage device MU described above, and has registered addresses from address 0 to address N corresponding to the trunk TRK, like the storage device EXC described above. The setting conditions of Elya SUP are periodically set to the same conditions as Elya EXC by the monitoring program, and the setting conditions of Elya SUP are set to the same conditions as Elya EXC by the call processing program.
is canceled at the same time. Furthermore, subscriber SUB
When the user hangs up the telephone, the call monitoring relay of the trunk TRK is restored, and this state change is sent to the trunk controller TKC.

Then, the call processing program periodically calls the central controller C.
C, it is sent to the trunk control unit TKC. According to the trunk state change detection order, the restored state change information of the above-mentioned call monitoring relay is also sent to the central controller CC as return data. The call processing program analyzes status changes based on the return data from the trunk control unit TKC. As an example, assuming that it is determined that the trunk TRK has been restored, a transition process from state A to state B is started. At this time, a status transition indication is set to the registered address corresponding to the trunk TRK of Erya EXC. Then, when the normal state transition processing is completed and state A is shifted to state B, the call processing program cancels the state transition display. Next, regardless of the call processing program, a monitoring program for detecting a trunk invalid hold is activated at a time period that fully takes into account the trunk transition processing time, reads the contents of the error SUP, and identifies the trunk invalid hold.

For identification, the contents from address 0 to address N of Elya SUP are sequentially read out and it is determined whether or not there is a monitoring indication. Elya SUP' This is when the monitoring display is set based on the contents of Elya EXC in the previous monitoring cycle, and the transition process is normally performed by the call processing program.
The transitioning display of and the monitoring display of Elya SUP are canceled. If an abnormality occurs during the recovery transition from state A to state B and the transition process is interrupted and abandoned, the monitoring display of Elya SUP will not be canceled and the content of Elya SUP will be changed in the next monitoring cycle. If you read out, the monitoring display remains set. The monitoring program finds the remaining trunk TRK of the Elijah SUP whose monitoring display has not been canceled from the address of the Elijah SUP, and detects it as trunk invalidity pending. For the trunk TRK determined to be invalid and pending, measures are taken to restore it to a normal state, and the transition display of Elya EXC and the monitoring display of Elya SUP are canceled so that the same trunk TRK is not repeatedly detected as invalid and pending. do. As a result of identifying the Elijah SUP from address 0 to address N, if there is no disabled trunk TRK, display the monitoring display based on Elijah EXC in order to monitor the trunk TRK that is currently undergoing transition processing in the next cycle. Set to SUP. In the embodiments described above, in consideration of the influence on the connection process, in one monitoring cycle, one invalid held trunk is found and the process is completed, and a new invalid held trunk is found in the next cycle.

As explained above, by using the trunk invalid hold detection method of the present invention, it is possible to reduce the burden on maintenance personnel without installing an expensive monitoring circuit for each trunk, and to be able to economically and reliably detect invalid trunks. There is.

[Brief explanation of the drawing]

FIG. 1 is a relay system diagram of an embodiment according to the present invention, FIG. 2 is a diagram of trunk edge state transition in the present invention, FIG. 3 is a registration diagram of display during state transition in a storage device according to the present invention, and FIG. 1 is a registration diagram of a monitoring display in a storage device according to the present invention. TRK...Trunk, CC...Central control unit, TKC...Trunk control unit, MU...
...Storage device, SUB...Subscriber. Figure 1 Tea Figure 2 Figure 3 *Figure 4

Claims (1)

[Claims] 1. In the trunk invalidation suspension detection method of the storage program control exchange, there is provided a transition memory circuit that stores the state transition of the trunk, and the contents of the transition memory circuit are written at a cycle longer than the processing time of the state transition, and the contents of the transition memory circuit are written at a cycle longer than the processing time of the state transition. a monitoring storage circuit whose contents are released along with the contents of the transition storage circuit upon completion of the state transition operation, is provided in the storage device for each trunk, and the transition storage circuit and the monitoring storage circuit are periodically connected to each other. A trunk invalidity suspension detection method is characterized in that a trunk whose state transition operation has not been completed is detected as an invalidity suspension trunk by monitoring the following.